Some other differences between the A319 and the A320, besides being 11 feet shorter:

The A319 has a simplified cargo smoke panel. The A320 has the ability to discharge fire extinguishing agent into a cargo hold after a fire is detected, then discharge a slower metering of agent 1 hour later to keep the fire suppressed in the event of a long diversion (2 bottles total). The A319 has a single fire suppression bottle for both cargo compartments (1 bottle). Otherwise, the cockpit is basically identical.

The A319 does not have any forward center of gravity special procedures. The A319 also does not have automatic alpha floor protection (stall protection) with flaps greater than 1 while single engine.

--Mark Rogers

(Probably not what he wanted to know, but I was just answering the title of the post)